Home UPPSC Prelims 2025 Mock Test Series MCQs

Question

What is the primary cause of ozone depletion in the stratosphere?

  1. Carbon Dioxide Emissions
  2. Methane Emissions
  3. Chlorofluorocarbons (CFCs)
  4. Sulphur Dioxide Emissions

Answer:

Option C: Chlorofluorocarbons (CFCs)

Detailed Solution:

The correct answer is “Chlorofluorocarbons (CFCs)”.

Chlorofluorocarbons (CFCs) are the primary cause of ozone depletion in the stratosphere. They release chlorine atoms that catalyze the breakdown of ozone molecules.